Technical Bulletins

Technical Bulletins

Synopsis of each tech bulletin updated 11-02-17

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TB-01- CM & Direct Expansion Geo HP Efficiencies

Basic method and discussion comparing the efficiency of water source geo heat pumps to direct expansion heat pumps.

TB-02-Manual 7– Heat Loss/Gain Analysis

Identifies the insulation and heat loss/gain factors/codes when estimating heating ventilating and air conditioning (HVAC) design requirements using manual-J.

TB-03-Iron Bacteria

A basic overview of various iron bacteria strains. Harmless to man but potential piping and valve problems if left untreat4ed. SEE also TB-16 & TB-37 for more details

TB-04-Freeze Cleaning ClimateMaster Koax HX

A professional’s, not a home owner’s, review of a cautious method to lightly freeze clean a KOAX heat exchanger. With over 18,000 heat pumps over the past 43 years, this has never been a requirement.

TB-05-Electrolysis Check

An easy to use method to verify an installation is free of electrolysis corrosion. A must for a professional installer to know and understand. SEE also TB-41

TB-06-Duct Sizing Guide

A summary guide of internal duct sizes to ensure quiet, dust-free and efficient air distribution for geothermal heat pump ducted heating and cooling

TB-07-System Cleanup after Compressor Burnout

An optional and definitive guide for advanced professional refrigeration technicians.

TB-08-Supply & Return Pipe Sizing Guide

Pipe sizing guide for noise-free and efficient low-pressure water distribution in a geothermal or other heated or chilled water comfort system

TB-09-Recharge Ideal Well Spacing for 2 Well App

For the professional designer, a simplified guide for spacing of a supply and reinjection geo/domestic well for an open well geothermal design. Based upon New England rock thermal characteristics.

TB-10-Retrofit Guidelines for Geo HP

Start here if considering a retrofit. The TB Identifies important components of an existing home’s condition and what actions the installer may require to make a successful and efficient heating (HVAC) geothermal heat pump installation.

TB-11-Closed Pipe, Closed Loop Ground Coupled

Review of closed loop designer and installer requirements, definition of “accredited installer” (AI); common antifreeze solutions pros and cons

TB-12- Pond Array

Ne of several methods to construct a reliable and easily cleaned pond water pickup for a geothermal heat pump. Used in deep none flowing water that ices over in winter.

TC-13- Kelvin Line Theorem

Calculus for the basis of the conductive earth heat transfer. Initially used to design closed loops and standing column wells. Presently used to evaluate and estimate design variation sensitivities as load factors, rock density and monotonic time factors.

TB-14-Residential SCWs-Reference Information

Directions and definitions on filling out information forms, in anticipation of well water earth coupling as standing column well or open to re-injection well

TB-15-CRC Control Reducing Costs

A low cost method to save 10-15% of the operational cost of a conventional submersible well pump motor. For a single and dedicated geo well, this method is an alternative to a variable frequency drive (VFD) pump motor.

TB-16-Flat Plate Heat Exchanger/Scaling & Water

Discussion of the technical and cost pros and cons of using a flat plate or a brazed plate heat exchanger externally or internally on a geothermal heat pump.

TB-17-Watt Saver Installation

For the HVAC or electrician; A recommended circuit that automatically turns off an electric water heater element when the integrated geothermal heat pump’s desuper heater is heating domestic water.

TB-18- Reducing well Pumping Energy& Op Costs

A definitive discussion of various methods to minimize well water pumping costs for a residential geothermal heat pump and recommendation of variable speed pump control

TB-19-GeoExchange in Deep Rock

A guideline description of the advantages of water wells for geothermal both standing columns and open to re-injection. Particularly directed to South East MA, River Valleys and Long Island.

TB-20-Filter Clog Indicator

Typical components for wiring of an automatic air filter “dirty” indicator

TB-21-Porter Shroud Holes

For the geo well contractor and installer: Description and requirements for a diffuser on a commercial “bottom set” Porter Shroud Assembly

TB-22-Static Pressure Calc for Energy Star Rating

Definition of terms and methods to successfully complete a typical Energy Start rating form. Note: Energy Star requirements may vary from program to program

TB-23-Fan Coil control

Review of various water flow and fan controls for Hydronic fan coil heating and cooling terminals

TB-24-VFD Pressure Transducer Replacement

For HVAC/controls technician – Replacing a Johnson Control pressure transducer with a Serta transducer

TB-25-Bleed thermostats

For HVAC/Controls technician – Connecting the RANCO temperature sensing device to a motorized bleed control valve

TB-26-PHD startups

A comprehensive review of the methods and caveats when starting up a Pool Heater and Dehumidifier (PHD) for a natatorium.

TB-27-Sequence of Op Multiple Independent SCWs

Technical Bulletin describes a pattern of sequencing the wells on and off to ensure that when fewer than N wells are on then no well runs longer than period P. Also reviews bleed logic.

TB-28-SCW Return Restriction

Check list for well piping and flow design and sizing, with emphasis on reduction of operational costs and pressure drops

TB-29-SCW Slave Starting

For HVAC/controls technician – Tips on staring up a Variable Frequency Drive (VFD) well pump system with multiple wells

TB-30-Multiple SCW Balance Procedure

For HVAC/Geothermal Earth coupling technician- Recommended method to verify and balance multiple well water systems including standing columns and open to re-injection wells.

TB-31—Multiple SCW Manifold Design

For geothermal designer – Guide lines and design criteria for a successful in-building well water manifold.

TB-32-Multiple SCW Startup Log

Recommended method and documentation for startup of a single or Standing Column Well field

TB-33- Geothermal Earth Coupling

POPULAR for all disciplines and interests – discuses the pros and cons of the three most common methods for geothermal heat pump earth coupling.

TB-34-CM Heat Exchanger Piping & Joining connections

Information for regulatory agencies; relating to geothermal heat exchanger fabrication, materials and performance.

TB-35-VFD Programming Guidelines

Using a Yaskawa P7 variable frequency drive system, management, control settings and guidelines for the successful startup verification

TB-36-Refrigerants and Oils

Information for regulatory agencies; relating to minimizing and mitigation of leaked refrigerants and refrigerant circuit lubricating oils

TB-37-Well disinfection Procedure

Typical methods for disinfection of existing and new water wells. Relating to domestic and geo heat pump recommended well water management.

TB-38-Outdoor Swimming Pool Heat

The most efficient method for outdoor pool water temperature control. Identifies advantage of harvesting residential air conditioning from same earth coupling field.

TB-39-Makeup Air with Geothermal

A design method of actively capturing discharge ventilation air energy for heating makeup air

TB-40-Geothermal Natatorium Conditioning

For a designer: the integration of a SERESCO natatorium dehumidifier/pool and space heater with geothermal heat pump efficiency

TB-41-Erosion & Corrosion

For the designer and HVAC technician; Avoiding the degenerative effects of combined electrolysis, velocity erosion and resultant corrosion.

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